Use ModifyTargetGroup with a CLI

To modify the health check configuration for a target group

The following modify-target-group example changes the configuration of the health checks used to evaluate the health of the targets for the specified target group. Note that due to the way the CLI parses commas, you must surround the range for the --matcher option with single quotes instead of double quotes.

aws elbv2 modify-target-group \
    --target-group-arn arn:aws:elasticloadbalancing:us-west-2:123456789012:targetgroup/my-https-targets/2453ed029918f21f \
    --health-check-protocol HTTPS \
    --health-check-port 443 \
    --matcher HttpCode='200,299'

Output:

{
    "TargetGroups": [
        {
            "TargetGroupArn": "arn:aws:elasticloadbalancing:us-west-2:123456789012:targetgroup/my-https-targets/2453ed029918f21f",
            "TargetGroupName": "my-https-targets",
            "Protocol": "HTTPS",
            "Port": 443,
            "VpcId": "vpc-3ac0fb5f",
            "HealthCheckProtocol": "HTTPS",
            "HealthCheckPort": "443",
            "HealthCheckEnabled": true,
            "HealthCheckIntervalSeconds": 30,
            "HealthCheckTimeoutSeconds": 5,
            "HealthyThresholdCount": 5,
            "UnhealthyThresholdCount": 2,
            "Matcher": {
                "HttpCode": "200,299"
            },
            "LoadBalancerArns": [
                "arn:aws:elasticloadbalancing:us-west-2:123456789012:loadbalancer/app/my-load-balancer/50dc6c495c0c9188"
            ],
            "TargetType": "instance",
            "ProtocolVersion": "HTTP1",
            "IpAddressType": "ipv4"
        }
    ]
}

For more information, see Target groups in the Applicaion Load Balancers Guide.

Example 1: This example modifes the properties of the specified Target Group.

Edit-ELB2TargetGroup -TargetGroupArn 'arn:aws:elasticloadbalancing:us-east-1:123456789012:targetgroup/test-tg/a4e04b3688be1970' -HealthCheckIntervalSecond 60 -HealthCheckPath '/index.html' -HealthCheckPort 8080

Output:

HealthCheckEnabled         : True
HealthCheckIntervalSeconds : 60
HealthCheckPath            : /index.html
HealthCheckPort            : 8080
HealthCheckProtocol        : HTTP
HealthCheckTimeoutSeconds  : 5
HealthyThresholdCount      : 5
LoadBalancerArns           : {}
Matcher                    : Amazon.ElasticLoadBalancingV2.Model.Matcher
Port                       : 80
Protocol                   : HTTP
TargetGroupArn             : arn:aws:elasticloadbalancing:us-east-1:123456789012:targetgroup/test-tg/a4e04b3688be1970
TargetGroupName            : test-tg
TargetType                 : instance
UnhealthyThresholdCount    : 2
VpcId                      : vpc-2cfd7000

Example 1: This example modifes the properties of the specified Target Group.

Edit-ELB2TargetGroup -TargetGroupArn 'arn:aws:elasticloadbalancing:us-east-1:123456789012:targetgroup/test-tg/a4e04b3688be1970' -HealthCheckIntervalSecond 60 -HealthCheckPath '/index.html' -HealthCheckPort 8080

Output:

HealthCheckEnabled         : True
HealthCheckIntervalSeconds : 60
HealthCheckPath            : /index.html
HealthCheckPort            : 8080
HealthCheckProtocol        : HTTP
HealthCheckTimeoutSeconds  : 5
HealthyThresholdCount      : 5
LoadBalancerArns           : {}
Matcher                    : Amazon.ElasticLoadBalancingV2.Model.Matcher
Port                       : 80
Protocol                   : HTTP
TargetGroupArn             : arn:aws:elasticloadbalancing:us-east-1:123456789012:targetgroup/test-tg/a4e04b3688be1970
TargetGroupName            : test-tg
TargetType                 : instance
UnhealthyThresholdCount    : 2
VpcId                      : vpc-2cfd7000